Unobtrusive Ajax is about making web
applications that work for everyone all
the time, even if you have JavaScript
turned off, or you're using a mobile
phone or a screen reader, or however you
happen to be using the Web. It's about
the separation of behavior (JavaScript),
content (HTML), and presentation
(CSS).

This short cut will focus on the practical
benefits of using Ajax and JavaScript unobtrusively
and show you that unobtrusive
web development and progressive
enhancement benefit both web developers
and users of the Web. You'll get to see
many simple examples of building web
interfaces that are unobtrusive. You'll
quickly see that it is actually very easy to
make web applications that everyone
can use.

When you're finished reading this book,
you will be able to convince anyone why
developing unobtrusively is the best way
to build a site with JavaScript and Ajax.

I wrote this book back in 2007, before I'd discovered jQuery, so writing unobtrusive JavaScript has become even easier than ever. That said, the principals of writing web pages that work without JavaScript remain the same: keep your content in the HTML, use real links and forms, and avoid depending on JavaScript or Flash for any critical functionality.

Nowadays, I would also suggest bearing different user interfaces in mind. Not every visitor to your website has a mouse and a keyboard, some are using their handheld touchscreen phones, and if your shopping cart requires people to drag and drop, you may end up losing customers. Be careful not to make assumptions about your visitors. If you stick with basic HTML, you can't go wrong.

Thanx for sharing these valuable knowledge.I need your help..Actually i want to learn about web devlopement.Which include php,ajax,jhoombla,mysql.But my seniors told me that it has no future.so kindly tell me about web devlopement future in the above mention courses..I am a fresher and i really need your help.I will wait for your reply in my mail.Thanking you..bye.

I love to read ebooks and they are economical than the books as it is not possible for everyone to read all the books by purchasing them all, and it is also not possible to carry the books to everywhere.